yahoo.com
Heading to yahoo.com? Heads up: it’ll track you. 19 companies follow visitors from here.
Heavy tracking seen
10/100
- 2 tracking companies were seen loading before any choice was made
- 2 tracking companies were seen after we clicked reject
- The banner asked visitors to accept 224 ad-industry “partners”
- 19 cross-site tracking companies were seen after accepting
Where the data went
From our checker in London to 16 tracker server locations in 9 countries. Drag to spin.
- Advertising
- Analytics
- Data broker
- Our checker (London)
Server locations
Tap one to find it on the globe
Companies
Who showed up
- 01GGoogleAd network, analytics and search · Mountain View · servers in Dublin, Palo AltoAdvertisingBeforeAfter rejectAfter accept
- 02TTaboolaContent recommendation ads · New York · servers in Frankfurt am Main, LondonAdvertisingBeforeAfter rejectAfter accept
- 03CComscoreAudience measurement · Reston · servers in LondonAnalyticsBeforeAfter rejectAfter accept
- 04AAmazon AdsAd network · Seattle · servers in Seattle (South Lake Union)AdvertisingBeforeAfter rejectAfter accept
- 05CCriteoRetargeting ad network · Paris · servers in GroningenAdvertisingBeforeAfter rejectAfter accept
- 06EEpsilonMarketing data (data broker) · Irving, TX · servers in Frankfurt am MainData brokerBeforeAfter rejectAfter accept
- 07EEquativAd exchange · Paris · servers in Amsterdam, Frankfurt am MainAdvertisingBeforeAfter rejectAfter accept
- 08IIndex ExchangeAd exchange · Toronto · servers in Toronto (Old Toronto)AdvertisingBeforeAfter rejectAfter accept
- 09LLinkedInProfessional network and ad platform · Sunnyvale · servers in LondonAdvertisingBeforeAfter rejectAfter accept
- 10LLiveRampIdentity graph (data broker) · San Francisco · servers in Kansas CityData brokerBeforeAfter rejectAfter accept
- 11MMagniteAd exchange · Los Angeles · servers in Boston, AmsterdamAdvertisingBeforeAfter rejectAfter accept
- 12MMedia.netContextual ads · Dubai · servers in Kansas City, ParisAdvertisingBeforeAfter rejectAfter accept
- 13MMicrosoftAd network and analytics · Redmond · servers in DublinAdvertisingBeforeAfter rejectAfter accept
- 14OOpenXAd exchange · Pasadena · servers in Kansas CityAdvertisingBeforeAfter rejectAfter accept
- 15PPubMaticAd exchange · Redwood City · servers in Paris, SingaporeAdvertisingBeforeAfter rejectAfter accept
- 16RRTB HouseRetargeting ad network · Warsaw · servers in AmsterdamAdvertisingBeforeAfter rejectAfter accept
- 17SSeedtagContextual ads · Madrid · servers in Kansas CityAdvertisingBeforeAfter rejectAfter accept
- 18SSovrnAd exchange · Boulder · servers in DublinAdvertisingBeforeAfter rejectAfter accept
- 19TTeadsContent recommendation and video ads · New York · servers in ChicagoAdvertisingBeforeAfter rejectAfter accept
- 20TThe Trade DeskAd buying platform and identity (UID2) · Ventura · servers in Seattle (South Lake Union)AdvertisingBeforeAfter rejectAfter accept
From our last check on 27 Oct 2026 from London: homepage only, three fresh visits (did nothing, clicked reject, clicked accept). Server locations are approximate, from the IP addresses we connected to. Some requests after rejecting may be strictly necessary services; this is what we observed, not proof that the site broke the law. How we check · Run this site? Ask for a re-check or add a statement
Last checked
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